3dcart also allows you the option of setting discounts based on the quantities of products ordered. For example, you may want to offer your customer a discount on a particular item if purchased in bulk. This can be done in the product's Discount Tab which is the sixth tab on the product creation pages

Quantity Pricing

Go to Products ->Product List

Select the item you'd like to set quantity pricing for and proceed to its "Discount" tab

Click "+Add" at the top right and enter your first quantity range

Specify your the customer group pricing level the discounts will apply to*.

*Note Customer group pricing levels are levels where you can specify different pricing amounts that apply to your customers; depending on which group they belong to. The Quantity Pricing feature can be used to only apply bulk discounts for specific customer groups if you desire. For example, retail customers may pay regular price (even in bulk) but you may want your wholesale customers to be able to purchase in bulk at an added discount. Customer Groups are discussed in more detail here

Specify your discount amount and type

Click "Add."

Repeat until you've completed your quantity ranges.

Once the quantity pricing is configured, your product will contain a graph showing your customers what the price ranges when the link is clicked.

Note: When adding your quantity discounts, you can either specify a dollar amount or a percentage. This discounted amount will be deducted from the product's unit price for the given price level. For example, if the pricing level is set to level 1 (Retail) the discount will be deducted from the retail price. However, if the pricing level is set for one of your customer groups, the discount is applied to that unit price instead.

Remember to keep your product's base cost in mind when offering discounts so you don't inadvertently sell your items at a loss. For simplicity, it may be best to use percentages rather than dollar amounts to specify your discounts.